From Cppreference
| Defined in header <cmath>
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| #define FP_ZERO /*implementation defined*/
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| (C++0x feature)
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The FP_ZERO macro expands to an integer constant expression. It represents a type of floating point values and indicates that the value is positive or negative zero.
See also
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| categorizes the given floating point value
(function)
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| indicates infinite floating point value
(macro constant)
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| indicates not-a-number (NaN)
(macro constant)
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| indicates normal number
(macro constant)
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| indicates subnormal number
(macro constant)
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